Kabl viktor hudist



K. V. RUDIN FULL STROKE MECHANISM FOR CALCULATING MACHINES.

APPLICATION FILED SEPT- I6, I920.

Patented Aug. 1

iii tr it t. QM Zme a KARL vrnron nnmn, or ,STOCKI-IOLCM, swnnnn.

Specification of Letters Patent.

Patented ring. Li,

Application filed September 16, 1920. Serial No. 410,638.

To of? whom, it may concern.

Be it known that i, KARL Viii'ron Room, suhjcct'oi the King of Sweden, residing at 12 Ha ."di.iansnlakaregatan, Stockholm, Sweden. have invented certain new and useful Improvements in l ull-i itroke Mechanisms for (alculating Machines (for which i filed an application in Sweden-September 6, 1919, No. l,l61/19), of which the following; is a specification.

The present invention relates to computing and similar machineswhich are provided with reverse looks, that is, such locks where a return rotation of the crank during a certain portion of its rotation is prevented by a movable lock which upon reversing oi the crank automatically enters into engagement with a locking, element provided on the crank shaft or another element which ablutely participates in the movement of the crank. During the free movement of the crank the lock retracts on the teeth of the locking element and causes thereby a cliclc.

coact with a locking arm pivoted on the frame, it is )I'OPOSQCl to provide immediately next to the locking element a second circular disk which in connection with an abutment on the locking arm maintains the locking arm during a normal rotation out of contact with the l coking element but enters into locking position as soon as the direction of rotation of the crank, after starting of a comput- .ing operation is reversed. It has been found that in this reversing of the rotation of the crank the abutment oi the locking arm has a tendency to clamp with the disk coacting with the abutment, the crank has to he reversely rotated when it is to he released from the locking position and to be continued in the forward rotation.

In order to avoid this disadvantage in accordance with the present invention, a disc is arranged next to the locking element, which disc is continuously in engagement ter-connected andso arranged that the locking arm participates in the rotary movement oi: the appertaining disc only by friction and is brought into and out ofengagement with the locking disc. The oscillating; movement of thelocking arm from the locking position is limited by a stationary obstacle overcomingthe friction whereby the locking arm in the free positionisontj of engagement with the teeth of the locking element.

The drawingillustratcs an embodiment of the invention. In said drawing Fig. 1 shows the right end of a computing); machine provided with a reverse lock, the top plate opposite the locking mechanism having been removed. 2 shows to an enlarged scale in top view the locking mechanism. 7

Figs. 3 to 6 show in section on the line fn ih in Fig: 1 the locking mechanism in different positions. A

()n the shaft 1 of the crank a locking disc 2 and a gear 3 are arranged which are in mesh with a gear 5, fast on a rotary shaft 4. On the shaft 4:, furthermore, a locking element 6 is rotatably mounted which is provided for cooperation with a locking disc 2 and whose rotary movement is limitedby two stationaryabutments 7,8 which are arranged in the path of the arm 9, protruding from the locking element 6. The locking element 6 is forced against the gear 5 by means of a resilient disc 11 arranged between the element 6 and the side wall 10 of the machine and arranged on the shaft 4. The

element is therefore carried along by the rotation of the disc.

The operation is as iollows:-

In the idle position of the crank 12, Fig. 3, the point of the element 6 cooperating with the locking disc 2 is in a cutout portion of the disc 2. From this initial position the crank 12 may be rotated in hothdirections, for instance, in the direction shown by the arrows in Figs. 4 and 5, the gear 5 of course rotating in opposite direction. In view of the friction between the gears 5 and the lock 6, the latter is carried along until the arm 9 engag s the abutment "7, Fig.

so that a return rotation of the crank 12 is,

still possible in which the gear 5, whose direction of rotation is simultaneously reversed, would carry along the element 6 until i the arm 9 engages the abutment 8. In Fig. 5it isassumed that the direction of rotation indicateclin Fig. 4i is maintained. 'The cut out portion in the edge of the disc 2 has completely pas ed the point of the element 6 andthe teeth of the disc 2 areout of engagement with the elementfi as long as the crank is rotatedin the samedire'ction- Upon reversal of thedirectionof rotation the gear 5 carries along the locking arm 6 untilthe arm enters into engagement with. the teeth of the disc 2, Fig. 6 and the movement of the crank is prevented without a clamping effect which prevents the release of theelement upon 1'0 tation of the crankin opposite direction. If,

thereforefthe started direction of rotation shown in 4L- and 5 is continued the =ele-'- meat 6 pivots hack rearwardly until the arm 9 engages the abutment 7." Upon a rotary movement in the-opposite direction the abutment 8 would serve as-a lock for the element 6. Y

As is established fromthe a'hove description, the locking elementis maintainedout of engagement with the locking disc as long as the'normal direction of; rotation is retained and a-reverse direction can only be executed either before the passing of the points of the element in front of the disc 2' or after a complete revolution of the crank,

counting from the idle position. The cutout portion is so diminished thatthe crank may i still be turned back until the parts necessary for completing the computing operation are not anymore in activity, that is, during the first quarter of revolution of the crank.

WVhat I claim is i 1. In combination with the crank shaft of a calculating machine of the Trinks type, a reverse lock comprising a toothed disc having a segmental notch, said disc being arranged for rotation with said shaft, a spur gear revoluble with said disc; a shaft mounted for rotation, a second gear fast on said last named shaft and engaged with the first named spur gear, a locking element loosely mounted onsaid last-named shaft and arranged to engage the teeth of said disc, yieldable means to cause said locking element to turn by frictional contact with said second gear, and means to limit the extent of the turning'movement of said locking ele-. ment;

In combination with the crank shaft of a calculating machine of the Trinks type, a reverse lock comprising a toothed disc having a segmental notch, said disc being arranged for rotation with said shaft, a spur gearrevoluble with said disc; a shaft mount-v ed for rotation, a second gear fast on said last named shaft and engaged with the first named spur gear, a locking element loosely mounted onsaidlast'named shaft and arranged to engage'the teeth of said disc, fixed stops to limit the extent of-theturningmovement of said locking element and betweenwhich the arm of said element operates, yieldable means to cause saidlockingelement to turn by frictionalcontact with said second gear, said lockingeleinent having an arm, and means to limit the extent of the turning movement of said locking element.

la testimony whereof I aflix my signature in presence of two witnesses.

KARLVIKTOR RUDIN.

Witnesses I FRITZ E. HANEY, 'LIN'NIA NESLIN. 

